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NCT Number: NCT07123038

A Long-Term Follow-Up Observational Study to Evaluate Safety in Subjects Who Have Received a Gene-Modified Regulatory T Cell (Treg) Therapeutic

To assess the emergence, type, severity, and potential causality of delayed adverse events following administration of a gene-modified Treg therapeutic.

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Key information

About this study

The purpose of this LTFU study is to evaluate safety (delayed adverse events) for up to 15 years in subjects who have received a gene-modified Treg therapeutic within clinical studies NCT06201416, NCT6361836. This is a Phase 4, multi-center long-term follow-up observational study to evaluate long-term safety in subjects who have received a gene-modified Treg therapeutic across Sonoma Biotherapeutics, Inc. clinical studies. The duration of the study is up to 15 years after dose of a Treg therapeutic in prior parent treatment protocols (SBT777101-01 and SBT777101-02) conducted by the Sponsor. Study visits will occur in accordance with the Schedule of Assessments.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Subject was previously administered at least 1 dose of a Sonoma Biotherapeutics, Inc. gene-modified Treg therapeutic in a prior parent treatment protocol.
  • Subject understands the purpose and risks of the study and is willing to provide written informed consent.
  • Subject is willing to comply with all study procedures for the follow-up period.

Exclusion criteria

  • Participation in the study is not in the subject's best interest, in the opinion of the Investigator

Treatment and study plan

Long Term Safety Monitoring Procedures

Other

In accordance with the schedule of assessments, participants will complete the long term safety and health questionnaire and will undergo routine physical examinations. A review will be conducted on selected adverse events, medical history, and concomitant medication use. Collection of biospecimens (blood and tissue) will be taken as appropriate at scheduled visits to monitor for delayed adverse events related to prior cell therapy.

Primary outcomes

  1. Incidence of delayed adverse events considered at least possibly related to the SBT777101 gene-modified Treg therapeutic

    Time frame: 15 years

Secondary outcomes

  1. Persistence of the SBT777101 gene-modified Treg therapeutic

    Time frame: 15 years

  2. Incidence of replication competent lentivirus (RCL)

    Time frame: 15 years

  3. Mortality in patients who received a gene-modified Treg therapeutic

    Time frame: 15 years

Study contacts

Contact information is provided by the study sponsor or research team.

Jason Do

CONTACT

[email protected]

415-992-6245

Sabrina Fox-Bosetti, MPH

CONTACT

[email protected]

415-992-6245

Sponsors and collaborators

Lead sponsor

Sonoma Biotherapeutics, Inc.

Industry

Registry information

Important dates

Study start
2025
Primary completion
2040
Study completion
2040
First posted
Aug 14, 2025
Registry last updated
Apr 16, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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